Reinforced corrugated paperboard container and joint therefor



Dec. 9, 1958 P. c. srRlNE REINFORCED CORRUGATED PAPERBOARD CONTAINER ANDJOINT THEREFOR Filed Aug. 1o, 1956 I llllllllllllgv Anw/1 RW /w mm New@M P m lll REINFORCED CORRUGATED PAPERBOARD CNTAINER AND JOINT THEREFORPhilip C. Strine, Chatham, N. J., assignor to International PaperCompany, New York, N. Y., a corporation of N ew York Application August10, 1956, vSerial No. 603,296

3 Claims. (Cl. 229-47) This invention relates in general to containersand reinforced structural panels for fabricating such containers, andparticularly to a new and useful strap-reinforced container and toclosure wall joints for such containers made by tearing away an outsidecovering of the panels to expose the reinforcing straps and thereaftersecuring together the ends of aligned straps of overlapping panels.

This invention is particularly applicable for the securing together ofoverlapping adjacent side walls and for securing together of overlappingclosure panels `of containers or structural members which are made ofcorrugated paperboard or the like, reinforced by metal straps interposedbetween layers or laminae during the fabrication. The reinforcing strapsin the case of corrugated paperboard panels, for example, are adhesivelysecured or held between the corrugated medium and an outside liner, orsingle or double faced corrugated paperboard is formed in the usualmanner and an additional outer liner is adhesively secured over one ofthe faces with the metal straps disposed in between. It has beendiscovered in accordance with this invention that reinforced corrugatedpaperboard panels can be used to great advantage in the formation ofstructural walls, container side walls or container closures byutilizing the panels in such a way that adjacent panels can be fastenedtogether by joining together the reinforcing straps after the coveringhas been peeled away to expose a short length of the straps.

Accordingly, it is an object of this invention to provide an improvedcontainer made from corrugated paperboard or the like, reinforced withstrapping and having overlapping closure panels which are secured in aclosing position by tightening and fastening together aligned ends ofthe reinforcing straps adjacent the overlapping panels.

Another object of this invention is to provide a connecting joint ofoverlapping structural panels made of corrugated paper board, or thelike, and reinforced with integrally formed strapping.

A further object of this invention is to provide a container rugged inconstruction, simple in design and economical to manufacture.

For a better understanding of the invention, its operating advantagesand specific objects attained by its use, reference should be had to theaccompanying drawings and descriptive matter in which there isillustrated and described a preferred embodiment of the invention.

In the drawings,

Fig. l is a perspective view of an open container having overlapping topclosure panels formed in accordance with this invention;

Fig. 2 is a perspective view of the container shown in Fig. 1, but withthe top panels secured in a closed position;

Fig. 3 is a perspective view of two adjoining structural panels, thesecuring joint of which is formed in accordance with this invention;

Fig. 4 is a horizontal section taken on the line 4 4 of Fig. 3;

Fig. 5 is a perspective view of another embodiment of Patented Dec. 9,1958 a securing joint for two structural panels formed in ac cordancewith this invention; and

Fig. 6 is a horizontal section taken on the line 6-6 of Fig. 5.

Referring to the drawings in particular, the invention as embodiedtherein includes a container generally designated 10, made of corrugatedpaperboard having metal reinforcing straps 12 positioned between acorrugated medium 14 and an outside face or liner 16 thereof. Thereinforcing straps 12 might be of other materials besides metal, such asa textile tape, plastic, leather or other ilexible materials havingsubstantial tensile strength. The container 10 is generally rectangularin outline and is provided with a top closure panel 18 and a top closurepanel 20 which are made long enough so that when they are in a closedposition the panel 13 overlaps the panel 20. The straps 12 may beadhesively secured in position, but in some instances movement of thestrap without crumpling of the corrugated paperboard is essential. Inthose cases the straps are not glued in place.

In accordance with the invention a strip 22 of the liner 16 is torn awayin the area overlying the straps 12 immediately adjacent the outsideedges of the panels 18 and 20 to expose the ends of the reinforcingstraps 12. To facilitate this peeling away of the layer covering thestraps 12 the liner 16 is in some instances perforated or slit alonglines overlying the sides of the straps. The straps 12 are peeledbackwardly from the faces of the panels 18 and 2i) and the panels areplaced in their normal closed position. Each securing strap 12 is thenmoved into overlapping relationship with its opposite end, drawn tightand then secured together by the usual strap-securing tool which appliesa seal or fastener piece 23 to hold the strap ends tightly together.

In accordance with this invention reinforced structural panels made ofcorrugated paperboard, laminated bre board or the like, may be joinedtogether in a manner similar to the forming of the above describedcontainer closure merely by overlapping a portion of one panel over anedge'portion of another and pulling away the faces of the panelsoverlying the reinforcing straps in locations adjacent each overlappededge and securing the ends of the straps together by a strap-sealingmachine with the usual fastener piece 23.

One type of overlapping panel-securing or container corner joint isshown in Figs. 3 and 4. In this instance there is provided a structuralpanel 24 and a similar panel 26 each made of reinforced corrugatedpaperboard. The panel 26 is provided with a ap 28 hingedly folded tooverlap the front face of the panel 24. Strips 3i) of the outer liner ofeach panel are torn away to expose an underlying reinforcing strap 32.The adjacent ends of the strap are then overlapped one upon the otherand secured by the usual strap-securing means 34.

Figs. 5 and 6 disclose another type of structural panelsecuring orcontainer corner joint in which a straight panel 36 is secured to apanel 38 having an end portion 40 hingedly folded at right angles to themain portion and placed with its outer face in contact with the panel36. In accordance with the invention the panels 36 and 38 are securedtogether by peeling away strips 42 of the outer liner of each paneladjacent its outer edges to eX- pose an underlying reinforcing strap 44.Aligned slots 45, 4S are cut out from the panel 36 and the end portion40 in an area adjacent the inner edge of the portion 40 and beneath thestraps 44. The strap 44 on the panel 38 is passed through the slots 45and bent beneath the strap 44 of the panel 36 and the two straps aredrawn tight and secured with a seal 46.

The invention provides means for using structural panels made ofcorrugated paperboard, laminated fibre board or the like, and reinforcedwith metal strapping in any number of desirable ways. Reinforcedstructural panels can be fabricated as part of containers as shown inFigs. 1 and 2 which may be closed securely by fastening together thereinforcing straps in the manner de- Ascribed herein, or, the structuralpanels maybe used to form walls of large containers or similarstructures which require reinforcement, and in such cases adjacent wallsare fastened in the manner as described in Figs. 3 to 6.

While a specic'ernbodiment of the invention has been shown and describedin detail to illustrate the application of the invention principles, itwill be understood that the invention may be embodied otherwise withoutdeparting from such principles.

I claim:

1. A uniting joint for reinforced corrugated paperboard, laminatedbreboard or the like reinforced structural panels comprising overlyingand underlying panels each consisting of layers of material and havingan edge, a flat reinforcing strap for each panel held between layers ofsaid material and normally confined in extent by a said respective paneledge, the material of each panel overlying a short length of each saidstrap adjacent its end being raised from the strap to expose the end ofsaid strap, the exposed ends of the straps being in overlappingrelationship, and fastening means to secure said overlapping ends ofsaid straps together.

2. A uniting joint for reinforcing corrugated paperboard, laminatedfibreboard or the like material structural panels comprising a rst panelconsisting of layers of material and having a folded edge portion, asecond panel consisting of layers of material and having a face incontact with the folded edge portion of said rst panel, a flatreinforcing strap for each panel held between layers of the material ofthe respective panels, a portion of at least one of said panels beingcut away to form a slot aligned with a said strap, the material of eachpanel overlying a short length of each said strap adjacent its end beingraised from the strap to expose the end of said strap, one of saidstraps extending through said slot and the exposed ends of the strapsbeing in overlapping relationship, and fastening means to secure saidoverlapping ends of said straps together.

3. A container made from corrugated paperboard, laminated ibreboard orthe like comprising a tubular body portion, two closure panels havingoverlapped edges and hingedly connected to said body portion, said bodyportion and panels consisting of layers of material, a at reinforcingstrap held between said layers of material encircling said body portionand closure panels and normally confined in extent by the respectiveoverlapped edges of said closure panels, the material of each paneloverlying a short length of each said strap adjacent its end beingraised from the strap to expose the end of said strap, the exposed endsof the straps being in overlapping relationship, and fastening means tosecure said overlapping ends of said straps together.

References Cited in the le of this patent UNITED STATES PATENTS 757,827Middleton Apr. 19, 1904 1,252,680 Flora Ian. 8, 1918 1,527,021 WandelFeb. 17, 1925 1,914,845 Cook June 20, 1933 2,268,236 -Baird Dec. 30,1941 2,741,420 Bodard Apr. 10, 1956

